Get a binder and dividers. Put the dividers in the binder and use them to separate the different areas within the portfolio.
Determine how many sections the portfolio will contain. Decide if the portfolio will have a section for each subject area or a few subject areas. PreKinders also suggests things such as "photographs, art and stories."
Label the areas of the portfolio. Use the divider labels to write the different name of the subject areas then insert the labels into the part of the divider that holds the labels.
Insert student work in the appropriate section. For example, if it's a writing sample, insert it in the writing section of the portfolio. Punch holes in the work sample if the paper doesn't already have holes in it or to avoid punching holes in the work sample, put the work in clear sheet protectors and then insert the work into the portfolio.